German scientists use genetically-engineered bacteria to produce THC. Google translation of an article in Spiegel Online.

Kayser's team has now developed a method of producing the genetically engineered bacteria in the THC. "We have virtually copied the biosynthesis of the plant into a micro-organism," Kayser said in an interview with SPIEGEL ONLINE. The THC-production with another organism was possible for the first time worldwide.

THC is extracted from hemp grown in Germany, for growing and imports are legal. "Because the fibers contain less than 0.2 percent THC, the production process is correspondingly expensive," says Kayser. From the cannabis plant, which can contain up to 25 percent THC, the active ingredient may for legal reasons in Germany can not be won.